Mask Estimation For Missing Data Recognition Using Background Noise Sniffing

Sébastien Demange 1 Christophe Cerisara 1 Jean-Paul Haton 1
1 PAROLE - Analysis, perception and recognition of speech
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : This paper addresses the problem of spectrographic mask estimation in the context of missing data recognition. At the difference of other denoising methods, missing data recognition does not match the whole spectrum with the acoustic models, but rather considers that some time-frequency pixels are missing, i.e. corrupted by noise. Correctly estimating these ``masks'' is very important for missing data recognizers. We propose a new approach that exploits some a priori knowledge about these masks in typical noisy environments to address this difficult challenge. The proposed mask is then obtained by combining these noise dependent masks. The combination is led by an environmental ``sniffing'' module that estimates the probability of being in each typical noisy condition. This missing data mask estimation procedure has been integrated in a complete missing data recognizer using bounded marginalization. Our approach is evaluated on the Aurora2 database.
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Submitted on : Monday, June 19, 2006 - 3:05:09 PM
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Sébastien Demange, Christophe Cerisara, Jean-Paul Haton. Mask Estimation For Missing Data Recognition Using Background Noise Sniffing. IEEE International Conference on Acoustics, Speech, and Signal Processing - ICASSP 2006, May 2006, Toulouse/France. ⟨inria-00080562⟩

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